What is the best gas stabilizer for ethanol fuel?

Yamalube Fuel Stabilizer and Conditioner Plus is widely considered one of the best gas stabilizers for ethanol-blended fuels like E10. This alcohol-free formula prevents fuel oxidation, phase separation, and gum buildup, keeping fuel fresh for up to one year—even in high-moisture environments. It also protects aluminum and steel components from corrosion and extends spark plug life.

Unlike generic stabilizers, Yamalube’s formula is engineered specifically for marine engines exposed to ethanol-rich fuel blends, offering targeted protection for aluminum, steel, and sensitive fuel systems.

Yamaha - Yamalube Fuel Stabilizer and Conditioner Plus - 12 oz. Bottle - ACC-FSTAB-PL-12

As one of the best gas stabilizers for ethanol fuel like E10, Yamalube’s alcohol-free formula prevents oxidation and phase separation caused by ethanol absorbing moisture from the air. When used regularly, it keeps fuel fresh and stable for up to 12 months without draining your tank—making it ideal for seasonal storage and infrequent use.

May be used with Yamalube Ring Free Plus. Normal usage is1 oz. Fuel Stabilizer & Conditioner PLUS to every 3 gallons of fresh gasoline. For storage over 2months add 1 oz of Fuel Stabilizer & Conditioner to every 1 gallon of fresh gasoline. For best results, treat your gasoline before storage by adding 1 oz. of Yamalube Fuel Stabilizer per gallon for over 2 months of storage. Then run the engine for a few minutes to ensure the stabilizer circulates throughout the system, and top off the tank to prevent condensation.

Features:

• Size - 12 oz.
• Keeps fuel fresh and potent during prolonged storage for up to a year.
• Prevents gum and varnish deposits.
• Draining fuel for storage is not necessary with the use of this product.
• Cleans Carburetor Systems-Dissolves gum and varnish in the fuel system.
• Corrosion Inhibitor-Protects against corrosion in carburetor and fuel systems.
• Prevents carburetor icing and gas line freeze.
• Absorbs water in fuel line system and extends spark plug life.

→ What is the best gas stabilizer for ethanol fuel in boats?

Yamalube Fuel Stabilizer and Conditioner Plus is designed for ethanol-rich fuels like E10. It prevents phase separation, protects metal components from corrosion, and keeps fuel fresh for up to 12 months.

→ Can I use Yamalube fuel stabilizer for long-term storage?

Yes, it is ideal for winterizing boats and powersports engines. Use 1 oz per gallon for storage over two months, and there's no need to drain the fuel tank when using this product.

Whether you're prepping your boat for off-season storage or protecting fuel in high-humidity regions, Yamalube Fuel Stabilizer is one of the best gas stabilizers for ethanol use. Pair with Yamalube Ring Free Plus for complete protection and engine efficiency.